1.

f(x) = underset(1)overse(sinxcosy)/(y^(2)+y+1)dy, then

Answer»

`f'(X) = 0 AA x = (NPI)/(2), N in Z`
`f'(x) = 0 AA x = (2n+1)' (PI)/(2), n in Z`
`f'(x)= 0 AA x = npi, n in Z`
`f'(x) ne 0 AA x in R`

Solution :N//A


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